Which words belong?

Here is a set of words the all have something in common:

• CRYSTALIZE

• EARTHLINGS

• GELATINOUS

• LABYRINTHS

• PALINDROME

• SMOLDERING

• VANQUISHED

Which two of the following words also belong in this set?

• ADVENTURER

• DECAHEDRON

• EARTHBOUND

• FIENDISHLY

• MACROPHAGE

• SCIENTISTS

• WANDERLUST